Clapper block



Jan. 30, 1951 J, M WALTER 2,539,878

CLAPPER BLOCK Filed May 2, 1947 J m A I N VEN TOR. l'j'H/v M M1. TE?,

ATTORN EVS.

Patented Jan. 30, 1951 icuii Mtvairi,'jciiicillnatgmiic;assigner f5 The"c; A; Gray "cempaiiy, cincinnatioiioy corr* applicati@ Maya, 1947,?serai No.V 745,518:

s emma (alight- 5@ Myvinventionqrelates to devices usedfin metalplanersA onVw-hich'p-the tools are supported that cut intothe work asthe latter traverses past them. In the usual construction 'in planers atoolbox is provided which is supported. soV as to be tiltablyadjustable-gthisjbox serving to Vmount the apron or theclapper blocky ina pivotal man'- ner between' twoside' vbars whichfrom 'a pocket in whichthe block lie'swheiin operating" posi"- tion.' Ihe"'tot')1v loxlisfriu'vVve'dfonV aslide supported on tlha'rpf ofthe'`ric'zlii'iie,4 which slidemay be moved'up` a' dfdovvn' on the saddle either by power' or by'hand.

In the `o`peratioM into the? Workind i it is iovin'g in Qidirc'tioi'fand'` the Work nlno'ves inthe pposta'dilectn." I t 1S f'thisreason that the bldck or" apron which Vholds 'the tools ispvitallyinntd" aits tipp "endl s`"that the todls canta'il ov'tlre "surfvCaf`th'e work on`ts'ret`urn'.'mvntf It isdeSiralil'e,` HOW'- ever]andmdrn 'plaiies "are"'so"fequipped`,"' to provide means for liftingtheapn'slightly by' an automaticallyn operating, device"sucli" that'when the work. stroke 0'1?i thepla'ner table` is' completed theapronto'r clapper. block' will be pushedoiits seat ready to'trairth'etools over the work.`

Carrying this.` idea furthertit has"'"been suglgested4 that means" beprovided1 for" irn'pturtingV a er, the" weis' cui are; liftedvclear/of"V the work; and'willf` not'drag over it: It is'tofthewend "ofproviding-a practical device to accomplish this purpose that "theu1;')resentl inventionv is directed?V AsE illustrated, the invention yisshowi'asfapplied'to aLA particular-1 springrv count'erbalancedl apron'lof mypendi'ng applica-Morivv for' Pate'ntSer.I Nef-713,325, y,zt-liedNovember 1946? and 'nowY Patent N o;"`2,513 0,343`, granted Novemberz'14, 1950;' and `as "'uftil'izingwastandardvv type of 11rnechanis'in oflifting pin -1 for the apron, which the objective of myiinvention istoaugmentrather than seeking to provide an entirely different mechanism.In many of its aspects my invention' canbe'applied to variousif liftingdevices; ande theA spring counterbalanced type of apron, while desirableas a combination element in my invention is not essential. Itl willl berealized from the above statement that a lifting device for the apronmust be -one= whichcan operatf'irrespe'ctiveof the#positionofthe toollb'oirfcjri its slide' or'of itss1ide"on'=the planersaddle.` Such adevice iswinherently rconfined -in -its Iamplitude of movement because.ofy the necessities-ofconstruction, whereby it is fitted in with thenecessary elements of the saddle, slide, 'and tool box. It may 2 be:stated that irrespectiv'e of'Y theL particular mechainsm' 'used tooperate'fieth usii 1i-fief! for planer. apronsvconsists of Aa slide vpinnmuu ed, in theftocl box.` and operatedf from In'eclanisrn controlledfrom' the i planer rail; with; 'aff slibr'i rang 0fi movement.

The drawn-lgs are illustrative 'of' an example of niyinventionaiddshould not be "ta-lien asv disH closintle 'onli7 availablemechanical instrumentauties to whicii myiiivhtion" may' te applied( Inthe drawings L' Figure 1 is a side elevation'zof partA of "tl'ie"slide,v

the tool bei( and apron'according"to Inyinvention.V n

Figure -2` is a front "eieyaen "thereof Figuref 3 is front'elevatin" f'th" 'toer' box; with the apron removed frni'it's" mour'tirgl Figure 4 isaV verticaly section taken th'roii'gh the ral1"sad`dle', slide,` beiand'aponhsh'vving the novel parte therein incrpor'at'ed according to myinvention.

Figure v5 is a-Yview' i1lu's'trating'-theangle' of' lift attain'edb'y mydevice, being a section on the scale ofFig'ure butomitting theoperating'pa'rts; fOr'the4 lift.

Figure 6 is a" perspective of"l the augmenting? plate". Y

Figure? is a detailof'the operating'en'd ofl thejrcck plate operatingdevice in perspective,

Figure 8 is afdetail perspective showing ther mounting? for theJvro'cli' plate.

Re'ferring'first'tc the'i'g'eiieral parts illustrated' the' cross railof a planer "isindicated" at l, theel saddle at 2, the'slid on" whichthe" tool box is; supported at 3, and' tll'eftool box atl. The apron 5is hinged'on' a pin "6 supported at the:` upper end vof 'thetwoside'bars 'l of the tool box; In this case a fixed thimble-securedover one"end of lthe pnrE, mounts a torsional spring Si' Whichihasafreeendbearingon afprojectin of thernountingfbarH11-offtheapron;r Thisis the' structure of my ou-pending' application above; identied'towhichf reffrf nce is herebyfmade for fur-ther 'fdeta-ils@ and principlesof 'the structura The sprinlfg Sitendsf toliftthefaprong thus' serv-'lv'ing? as a counterbalance for'its 'gravity movement to position againstthe face ofthe tool? box'b'etween the twosidebars'I thereof. I haveindicated a'c'utting tool- Il; secured by the Y'n'u'i'fs Secured on 'theinner face of the slide in a hollow space adapted for the purpose are apair of lugs I'I, II, and a rock plate I8 is provided extending betweenthe two lugs and having slotted ends I9 (Fig. 8), which engage over thelugs and are held in place by suitable pivot pins passing through theslotted ends and the lugs.

This plate when rocked will engage a pin 20, which is the lift pin ofthe device, which isspring pressed toward the rock plate, and slidablyheld in the bushing I4. The spring pressure is adjusted by a threadednipple 2I in the outer end of the bushing I4. When the plate is rockedthe pin will be pressed outwardly through the bushing and thus supplythe power for lifting the apron from its operating seat. As shown, theapron has an overhanging lip 22 which engages under the shoulder at thelower edge of the tool box, to give rm support for the apron. The apronmust naturally also move away from this shoulder when lifted.

Going back from the rock plate, the mode of operating it which is shownfor illustrative purposes, is a rod 23 having a widened and slottedouter end 24 which rides over the elevating screw 24a for the slide.This outer end is provided with a pin 2'5 (Fig. 7), which bears againstthe rock plate so that when the rod is reciprocated the plate is rocked,contact being maintained by the spring on the push pin.

The rod 23 is introduced into the space occupied by the feed screw bypassing through the drive sleeve 26 for the screw. This sleeve has abeveled gear 2'I out on its inner end which meshes with a bevel gear ona collar 28 which rotates the feed screw when it is driven by power.

As so far described there is no substantial difference in the mechanismthan that already in use prior to my present invention or which is shownin my co-pending application.

A cavity is formed in the back face of the apron as shown at 29, thiscavity being of a shape to clear the motion increasing tongue 30 whichis hinged at 3I to the shoulder at the lower end of the tool box. Whenthe apron is in normal operating position the tongue lies within thiscavity as well as the hinged mounting for the tongue.

The tongue lies in front of the push pin, at a location selected withreference to the pivot point and length of the tongue so that the resultof pushing in on the push pin will be to rock the tongue on its hinge aselected distance. The upper end of the tongue will bear on the wall ofthe clearance cavity in the back of the apron resulting in a liftingmotion which is considere ably greater on the apron, than would be themovement of the pin itself.

This motion increaser results in giving the added elevation of the apronwhich is desired lifting the tools on the apron well away from thesurface of the work during its return strokes.

I have indicated a rocker 32 which moves the rod 23, this rocker locatedin the rail of the planer, and put into motion upon reversal of thetable movement.

It will be evident that the motion increaser located as it is permits ofthe use of any regular push pin mechanism on a planer and that theamount of motion of the apron is governed by the length of the tongue,and the proximity of the push pin to the pivot of the tongue This typeof motion increaser has the advantage, aside from simplicity, ofproviding that the initial motion of the apron is approximately a directmovement in line with the thrust nin movement. which takes 4 the task ofovercoming the inertia and friction opposing the initial movement. Theadded swinging movement can then be accomplished without exceptionalpower.

As already noted, the invention may be applied -to any other type ofpush pin operation and is not limited to the particular one described inorder to give an example of the invention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In combination a tool box, an apron pivotally secured at its upperend thereto, a push pin passing through the tool box where the apronlies thereon, and a motion increaser secured to the tool box betweensaid tool box and apron, engaged by the push pin, and engaging theapron, said motion increaser comprising a lever fulcrumed on the toolbox.

2. The combination of claim 1 in which the apron is provided with aclearance cavity for the lever.

3. In combination with a slide member mounted on the saddle of a planerhaving an elevating screw, and a rock plate located on said slide, andpower means straddling the elevating screw and engaging the rock plate,a push pin located in the slide and spring held in contact with the rockplate, a tool box mounted on the slide, having on its outer face a leverfulcrumed thereon in a position to be engaged by the push pin, and anapron pivotally held on the tool box and arranged to engage said lever,for the purpose described.

4. The combination of claim 1 in which the apron is springcounterweighted toward movement away from contact with the tool box.

Cil

5. In combination a tool box, an apron hinged thereto, a push pinpassing therethrough, an oppositely hinged lever mounted on the tool boxso as to be engaged by said pin and lying between the tool box and saidapron, the distance from the hinge point to the end of the lever beingsubstantially greater than the distance from the hinge point to thelocation of the tool pin, whereby a motion increaser is supplied to movethe apron on its hinged connection a distance further than the motion ofthe push pin.

6. The combination of claim 5 in which the apron is counterweighted onits hinged mounting.

7. The combination of claim 5 in which the apron is formed with a cavityfor clearance of the lever.

8. The combination of claim 5 in which the apron when closed against thetool box has a projection which underlies a shoulder on the tool box inwhich the apron is counterweighted on its hinged mounting, and in whichthe lever is mounted on the face of the tool box, said apron beingformed with a cavity to clear the lever and its mounting.

JOHN M. WALTER.

REFERENCES ClliED The following references are of record in the lle ofthis patent:

UNITED STATES PATENTS Number Name Date 1,372,286 Greenleaf Mar. 22, 19211,775,963 McCarroll Sept. 16, 1930 1,806,696 Mesker May 26, 19312,251,834 Praeg Aug. 5, 1941 2,387,012 Daugherty Oct. 16, 1945

